Thumbnail is not showing up

I was looking for the same type plugin. Do you have to set the images as “Featured” to get them to show on the page?

• This reply was modified 7 years ago by LesTexas60.

I made it. I have search in google for solutions and found it.

try to add this on the function.php

add_theme_support( 'post-thumbnails' );
set_post_thumbnail_size( 300, 200, true ); // Normal post thumbnails
add_image_size( 'New-Thumbnail', 300, 200, true ); // Permalink thumbnail size

add_filter('the_content', 'set_featured_image_from_attachment');
function set_featured_image_from_attachment($content) {
	global $post;
	if (has_post_thumbnail()) {
		// display the featured image
	} else {
		// get & set the featured image
		$attachments = get_children(array(
			'post_parent' => $post->ID, 
			'post_status' => 'inherit', 
			'post_type' => 'attachment', 
			'post_mime_type' => 'image', 
			'order' => 'ASC', 
			'orderby' => 'menu_order'
		));
		if ($attachments) {
			foreach ($attachments as $attachment) {
				set_post_thumbnail($post->ID, $attachment->ID);
				break;
			}
			// display the featured image
		}
	}
	return $content;
}

and after chose any thumbnail size on the plugin and you ‘r ready.

• This reply was modified 7 years ago by SonicxXx.